CN104183890A - Phase shift unit - Google Patents
Phase shift unit Download PDFInfo
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- CN104183890A CN104183890A CN201410379330.6A CN201410379330A CN104183890A CN 104183890 A CN104183890 A CN 104183890A CN 201410379330 A CN201410379330 A CN 201410379330A CN 104183890 A CN104183890 A CN 104183890A
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- medium plate
- phase
- parallel
- shifting unit
- strip
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Abstract
The invention discloses a phase shift unit. The phase shift unit comprises a first medium plate and a second medium plate. The two surfaces of the first medium plate are respectively provided with parallel conductor strips and first metal ground, and the two sides of each parallel conductor strip are each provided with a first grounding strip along a longitudinal direction; the two surfaces of the second medium plate are respectively provided with a U-shaped conductor strip and second metal ground, and the two sides of the U-shaped conductor strip are each provided with a second grounding strip along the direction of two parallel arms; the first medium plate and the second medium plate are arranged to the opposite to each other, the parallel conductor strips are in one-to-one correspondence with the two parallel arms of the U-shaped conductor strip for realizing electrical coupling, and each first grounding strip and each second grounding strip are in one-to-one correspondence for realizing electrical coupling; and the U-shaped conductor strip can move along the longitudinal direction of the parallel conductor strips so as to realize phase shift of signals. Such a structure enables the phase shift unit to have the advantages of light weight and small line and to realize high-efficiency transmission of the signals at the time when the phase shift is realized.
Description
Technical field
The present invention relates to radio-frequency devices field, particularly relate to a kind of phase-shifting unit.
Background technology
At mobile communication electricity, adjust in antenna for base station, the core component that phase shifter is antenna, its way of realization generally has medium sliding-type and the large type of conductors slide type two.
Medium sliding-type phase shifter often needs one for holding the metallic cavity of slip medium, medium slip Δ L
1the phase place producing is changed to:
wherein, ε
r1for the relative dielectric constant of coaxial dielectric, λ
0for free space wavelength, Δ L
1for sliding stroke.
The employing closed cavity that conductors slide type phase shifter has, makes conductor become strip line; What have does not adopt closed cavity, makes conductor become microstrip line.Conductors slide Δ L
2the phase place producing is changed to:
wherein, ε
r2for the relative dielectric constant of microstrip line dielectric substrate, λ
0for free space wavelength, Δ L
2for sliding stroke.
Generally, considering cost and loss factor, ε
r2and ε
r1value roughly the same, make
at sliding stroke Δ L
2=Δ L
1condition under, Δ φ
2> Δ φ
1.This derives explanation under identical sliding stroke, the phase place that conductors slide type phase shifter produces changes the phase place producing than medium sliding-type phase shifter and changes greatly, in other words, in phase place, change under identical condition, the required stroke of conductors slide type phase shifter is less, is more conducive to realize the miniaturization of phase shifter.
At present, conductors slide type phase shifter is compared with medium sliding-type phase shifter, and conductors slide type has the advantages that volume is little, stroke is short.If but conductors slide type phase shifter adopts cavity body structure, weight is heavier; If adopt the microstrip line construction without closed cavity, there is the line loss problem bigger than normal causing because of parasitic radiation and coupling loss.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of phase-shifting unit, makes it have the lightweight and little feature of line loss, can, in phase shift, realize the high efficiency of transmission of signal.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: a kind of phase-shifting unit is provided, comprises first medium plate and second medium plate; First medium plate two sides is respectively equipped with parallel conductor band and the first metal ground, and parallel conductor band both sides are respectively provided with the first earth strip along its longitudinally; Second medium plate two sides is respectively equipped with U-shaped conductor belt and the second metal ground, and U-shaped conductor belt both sides are respectively provided with the second earth strip along the direction of its two parallel arms; First medium plate and second medium plate are oppositely arranged, and parallel conductor band is corresponding to realizing electrical couplings one by one with two parallel arms of U-shaped conductor belt, and each first earth strip is corresponding to realizing electrical couplings one by one with each second earth strip; Second medium plate can move to drive U-shaped conductor belt to move with respect to parallel conductor band along the longitudinally of parallel conductor band, and then changes the length in the path of signal transmission in parallel conductor band.
Wherein, the first earth strip is connected with the first metal ground by some metallization via holes, and the second earth strip is connected with the second metal ground by some metallization via holes.
Wherein, the first earth strip and the second earth strip carry out the common electromagnetic armouring structure that forms of part and the corresponding metal of electrical couplings part ground of electrical couplings.
Wherein, the first metal and the second metal ground between parallel conductor band and/or U-shaped conductor belt be strip line.
Wherein, the electrical length of U-shaped conductor belt is 180 °.
Wherein, the displacement of U-shaped conductor belt is limited by the length of parallel conductor band.
Wherein, the length of the first earth strip is more than or equal to the length of parallel conductor band, and the length of the second earth strip is more than or equal to the length of U-shaped conductor belt parallel arms place direction.
Wherein, first medium plate is provided with two the first conductor belts and two the second conductor belts; In parallel conductor band, single conductor belt, the first conductor belt, the second conductor belt are electrically connected successively.
Wherein, two of parallel conductor band and U-shaped conductor belt parallel arms are directly adjacent to be coupled.Or, between parallel conductor band and U-shaped conductor belt, be provided with insulating barrier.
Wherein, phase-shifting unit comprises mounting panel, connector, pull bar and compressing member; The one side that mounting panel and first medium plate are provided with the first metal ground is joined; The both sides of connector are fixedly connected with second medium plate with pull bar respectively, and pull bar is used for driving second medium plate to move; Compressing member comprises the boss of plate body and two end longitudinal extensions of plate body, each boss is connected on first medium plate and is fixedly connected with mounting panel by the through hole on first medium plate, plate body and pull bar join, for compressing pull bar, connector, second medium plate and the first medium plate being cascading.
Wherein, first medium plate is provided with slit or groove for the fixture of holding fixed connecting piece and second medium plate, realizes the spacing slip of second medium plate.
The invention has the beneficial effects as follows: the situation that is different from prior art, phase-shifting unit of the present invention comprises first medium plate and second medium plate, first medium plate two sides is respectively equipped with parallel conductor band and the first metal ground, second medium plate two sides is respectively equipped with U-shaped conductor belt and the second metal ground, the setting that is coupled of two parallel arms of parallel conductor band and U-shaped conductor belt, and two parallel arms of U-shaped conductor belt can move with respect to parallel conductor band, to realize phase shift.Meanwhile, parallel conductor band both sides are respectively provided with the first earth strip, and U-shaped conductor belt both sides are respectively provided with the second earth strip, and each first earth strip and each second earth strip are corresponding to realize electrical couplings one by one.
Pass through said structure, the first earth strip and the second earth strip carry out the common electromagnetic armouring structure that forms of part and the corresponding metal of electrical couplings part ground of electrical couplings, electromagnetic armouring structure can play shielding action to the signal transmitting in it, thereby reduces the line loss that causes because of radiation leakage.
The first metal and the second metal ground between parallel conductor band and/or U-shaped conductor belt be strip line, compare the phase shifter of existing use metallic cavity strip line, there is lightweight feature.
Along with the movement of second medium plate, when parallel conductor band the first metal and the second metal ground between time, from original microstrip line, become strip line.
The electrical length of U-shaped conductor belt is 180 °, can realize mating of input impedance and port Impedance.
Accompanying drawing explanation
Fig. 1 is the structural representation of phase-shifting unit one embodiment of the present invention;
Fig. 2 is the exploded view of phase-shifting unit shown in Fig. 1;
Fig. 3 is the fixing structural representation of pcb board shown in Fig. 1;
Fig. 4 is the pcb board structural representation simultaneously that slides shown in Fig. 1;
Fig. 5 is the structural representation of pcb board another side of sliding shown in Fig. 1;
Fig. 6 is the schematic equivalent circuit of phase-shifting unit shown in Fig. 1.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
Refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, Fig. 1 is the structural representation of phase-shifting unit one embodiment of the present invention, Fig. 2 is the exploded view of phase-shifting unit shown in Fig. 1, Fig. 3-5th, the partial structurtes schematic diagram of phase-shifting unit shown in Fig. 1, as Figure 1-5, phase-shifting unit comprises: first medium plate 11, parallel conductor band 12, the first metal ground (not shown), the first earth strip 13, second medium plate 14, U-shaped conductor belt 15, the second metal ground (not shown), the second earth strip 16, connector 17, pull bar 18, mounting panel 19, compressing member 20, input port 21 and output port 22.
Wherein, phase-shifting unit also comprises two the first conductor belts 23 and two the second conductor belts 24.
Elaborate the structural relation of each part mentioned above below.
In the present embodiment, first medium plate 11, parallel conductor band 12, the first conductor belt 23, the second conductor belt 24, the first metal ground and the first earth strip 13 form fixedly pcb board, as shown in Figure 3; Second medium plate 14, U-shaped conductor belt 15, the second metal ground and the second earth strip 16 form slip pcb board, and as shown in Figure 4, Figure 5, Fig. 4 and Fig. 5 are respectively the positive and negative of slip pcb board.
Fixedly pcb board adopts two sided pcb to make, and is specially, the one side of first medium plate 11 is printed the parallel conductor band 12 of similar "=" and the first conductor belt 23, the second conductor belt 24 by etching technics, and another side is the first metal.Wherein, the single conductor belt in parallel conductor band 12, the first conductor belt 23, the second conductor belt 24 are electrically connected successively.Parallel conductor band 12 both sides are respectively provided with first earth strip 13, the first earth strips 13 along its longitudinally and are connected with the first metal ground by some metallization via holes.
Article two, the second conductor belt 24 connects respectively input port 21 and output port 22.
Slip pcb board adopts two sided pcb to make, and is specially, and the one side of second medium plate 14 is printed the U-shaped conductor belt 15 of similar " U " by etching technics, and another side is the second metal ground.U-shaped conductor belt 15 both sides are respectively provided with second earth strip 16, the second earth strips 16 along the direction of its two parallel arms and are connected with the second metal ground by some metallization via holes.
Wherein, fixedly parallel conductor band 12, the first conductor belt 23, second conductor belt 24 of pcb board are microstrip line, and the U-shaped conductor belt 15 of slip pcb board is microstrip line.Be specially, parallel conductor band 12, the first conductor belt 23, the second conductor belt 24 form microstrip line construction with fixing the first metal ground of pcb board another side; U-shaped conductor belt 15 forms microstrip line construction with the second metal ground of slip pcb board another side.
Fixedly pcb board and slip pcb board are close to mutually, make parallel conductor band 12 corresponding, overlapped with electrical couplings one by one with two parallel arms of U-shaped conductor belt 15, and each the first earth strip 13 and each second earth strip 16 are corresponding, overlapped with electrical couplings one by one.Be specially two parallel arms of U-shaped conductor belt 15 and the local location overlaid of parallel conductor band 12, realize electrical connection.Lap be co-located on fixing pcb board the first metal and the second metal ground of slip pcb board between, form strip lines configuration.And the position of lap on parallel conductor band 12 can change with the movement of slip pcb board.
Wherein, the first metal and the second metal ground between parallel conductor band 12 and/or U-shaped conductor belt 15 be strip line.Because the area of the present embodiment second medium plate 14 is less than the area of first medium plate 11, and the two is when be close to, and second medium plate 14 is no more than the border of first medium plate 11, and therefore U-shaped conductor belt 15 is strip line.
Wherein, for reducing line loss, the first metal ground, the second metal ground extend to the fixedly another side of pcb board, slip pcb board by metallization via hole, form the first earth strip 13, second earth strip 16 with certain area.The common electromagnetic armouring structure that forms in the corresponding metal of the lap of the first earth strip 13 and the second earth strip 16 and lap ground.The first earth strip 13 of lap and the mutual electrical couplings of the second earth strip 16, differ the connection status in electrical characteristic, and the signal transmission in it is played to shielding action, thereby reduce the line loss that causes because of radiation leakage.
Wherein, the length of the first earth strip 13 is more than or equal to the length of parallel conductor band 12, and the length of the second earth strip 16 is more than or equal to the length of U-shaped conductor belt 15 parallel arms place directions.
The both sides of connector 17 are fixedly connected with second medium plate 14 with pull bar 18 respectively.First medium plate 11 be provided with slit or groove for holding fixed connecting piece 17 fixture with second medium plate 14, realize the spacing slip of second medium plate 14.
Pull bar 18 can drive connector 17, and then drives second medium plate 14 to move, and then U-shaped conductor belt 15 is moved with respect to parallel conductor band 12, to change the length in the path of signal transmission in parallel conductor band 12, realizes the phase shift of signal.
Mounting panel 19 joins with the one side that first medium plate 11 is provided with the first metal ground.
Compressing member 20 is screwed on mounting panel 19, producing certain thrust makes second medium plate 14 and first medium plate 11 keep being adjacent to state, and in the sliding process of second medium plate 14, remain the state of being adjacent to, to guarantee the electrical communication characteristic between parallel conductor band 12 and U-shaped conductor belt 15, realize the stable transfer of signal.
Wherein, compressing member 20 comprises the boss of plate body and two end longitudinal extensions of plate body, and each boss is connected on first medium plate 11 and is fixedly connected with mounting panel 19 by the through hole on first medium plate 11.Plate body and pull bar 18 join, for compressing pull bar 18, connector 17, second medium plate 14 and the first medium plate 11 being cascading.Compressing member 20 has guide effect, and restriction pull bar 18 moves along the longitudinally of parallel conductor band 12.
Wherein, U-shaped conductor belt 15 moves along parallel conductor band 12, its sliding stroke is no more than the length of parallel conductor band 12, increase along with sliding stroke, two parallel arms of U-shaped conductor belt 15 and the lap of parallel conductor band 12 increase, input port 21 and the transmission path of output port 22 are shortened, and amount of phase shift diminishes.
In the present embodiment, parallel conductor band 12 is directly adjacent to be coupled with two parallel arms of U-shaped conductor belt 15.The first earth strip 13 and the second earth strip 16 are also directly adjacent to.
In other embodiments, between parallel conductor band 12 and U-shaped conductor belt 15, be equipped with insulating barrier between the first earth strip 13 and the second earth strip 16, and electrical couplings.
Refer to Fig. 6, Fig. 6 is the circuit theory diagrams of phase-shifting unit shown in Fig. 1, as shown in Figure 6, comprises transmission line 15,12,23,24 and port 21,22.Wherein, the quantity of transmission line 23,24 is two.
It is pointed out that the same numeral in Fig. 6 and Fig. 1-5 refers to same parts.
For simplifying the circuit analysis of phase-shifting unit, only enumerate the formula of impedance of center frequency point.In the center frequency point of working band, transmission line 15 is that electrical length is that 180 °, characteristic impedance are Z
1strip line, transmission line 12 is that electrical length is that dp, characteristic impedance are Z
2microstrip line, transmission line 23 is that electrical length is that 90 °, characteristic impedance are Z
3microstrip line, transmission line 24 is characteristic impedance and port Impedance Z
cidentical microstrip line.
Wherein, transmission line 15 is on slip pcb board, transmission line 12,23,24 is on fixing pcb board, slip pcb board can be adjacent to fixedly pcb board and slide, be that transmission line 15 slides along transmission line 12, the electrical length dp of transmission line 12 is changed, and then the length of transmission path between port 21 and port 22 is changed, realize the variation of transmission phase place.
According to terminal, there is the transmission line input impedance formula of carrying:
wherein, Z
0for transmission line characteristic impedance, Z
lfor load impedance, Z
infor input impedance, j is
Draw,
Because the electrical length of transmission line 15 is 180 °, in center frequency point, do not play impedance transformation effect, so, Z
in3=Z
in4,
The reflection coefficient of port 21
Above-mentioned is the analysis that the impedance relationship of each section of transmission line is carried out, and during design, selects reasonably
can make Z
in5=Z
2, according to above-mentioned formula, obtain Z
in4=Z
in3=Z
in2=Z
2thereby, make Z
in1=Z
c, realize mating of input impedance and port Impedance, guarantee the high efficiency of transmission of signals between ports.
The above, the slipper that the phase shift of the present embodiment phase-shifting unit is required and standing part are all used PCB structure, after fixedly pcb board and slip pcb board are close to, the U-shaped conductor belt 15 of slipper the first metal and the second metal ground between, form strip lines configuration, compare the conventional phase shift scheme of using metallic cavity strip line, the present embodiment phase shift scheme has lightweight advantage.And the structure of the present embodiment phase-shifting unit and electrical characteristic can make the signal high efficiency of transmission in it.
The present embodiment phase-shifting unit is the chief component of phase shifter, has following characteristics:
A. strip line combines with microstrip line, utilizes the principle of half-wavelength coupling, strip line is kept in sliding process and the matching status of microstrip line.
B. the physical length of strip line and microstrip line lap changes with sliding distance, and the form of microstrip line also can change with sliding distance, as: from microstrip line, become strip line, or from strip line, become microstrip line, this variation depend on microstrip line whether the first metal and the second metal ground between.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (12)
1. a phase-shifting unit, is characterized in that, comprises first medium plate and second medium plate;
Described first medium plate two sides is respectively equipped with parallel conductor band and the first metal ground, and described parallel conductor band both sides are respectively provided with the first earth strip along its longitudinally; Described second medium plate two sides is respectively equipped with U-shaped conductor belt and the second metal ground, and described U-shaped conductor belt both sides are respectively provided with the second earth strip along the direction of its two parallel arms;
Described first medium plate and second medium plate are oppositely arranged, and described parallel conductor band is corresponding to realizing electrical couplings one by one with two parallel arms of U-shaped conductor belt, and each first earth strip is corresponding to realizing electrical couplings one by one with each second earth strip;
Described second medium plate can move to drive U-shaped conductor belt to move with respect to parallel conductor band along the longitudinally of parallel conductor band, and then changes the length in the path of signal transmission in parallel conductor band.
2. phase-shifting unit according to claim 1, is characterized in that, described the first earth strip is connected with the first metal ground by some metallization via holes, and described the second earth strip is connected with the second metal ground by some metallization via holes.
3. phase-shifting unit according to claim 2, is characterized in that, described the first earth strip and the second earth strip carry out the common electromagnetic armouring structure that forms of part and the corresponding metal of electrical couplings part ground of electrical couplings.
4. phase-shifting unit according to claim 3, is characterized in that, described the first metal and the second metal ground between parallel conductor band and/or U-shaped conductor belt be strip line.
5. phase-shifting unit according to claim 4, is characterized in that, the electrical length of described U-shaped conductor belt is 180 °.
6. phase-shifting unit according to claim 5, is characterized in that, the displacement of described U-shaped conductor belt is limited by the length of described parallel conductor band.
7. phase-shifting unit according to claim 6, is characterized in that, the length of described the first earth strip is more than or equal to the length of parallel conductor band, and the length of described the second earth strip is more than or equal to the length of U-shaped conductor belt parallel arms place direction.
8. phase-shifting unit according to claim 7, is characterized in that, described first medium plate is provided with two the first conductor belts and two the second conductor belts;
In described parallel conductor band, single conductor belt, the first conductor belt, the second conductor belt are electrically connected successively.
9. phase-shifting unit according to claim 8, is characterized in that, two parallel arms of described parallel conductor band and U-shaped conductor belt are directly adjacent to be coupled.
10. phase-shifting unit according to claim 8, is characterized in that, between described parallel conductor band and U-shaped conductor belt, is provided with insulating barrier.
11. according to the phase-shifting unit described in claim 9 or 10 any one, it is characterized in that, described phase-shifting unit comprises mounting panel, connector, pull bar and compressing member;
The one side that described mounting panel and first medium plate are provided with the first metal ground is joined;
The both sides of described connector are fixedly connected with second medium plate with pull bar respectively, and described pull bar is used for driving second medium plate to move;
Described compressing member comprises the boss of plate body and two end longitudinal extensions of plate body, each boss is connected on first medium plate and is fixedly connected with mounting panel by the through hole on first medium plate, plate body and described pull bar join, for compressing pull bar, connector, second medium plate and the first medium plate being cascading.
12. phase-shifting units according to claim 11, is characterized in that, described first medium plate is provided with slit or groove for the fixture of holding fixed connecting piece and second medium plate, realizes the spacing slip of described second medium plate.
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|---|---|---|---|
| CN201410379330.6A CN104183890B (en) | 2014-08-04 | 2014-08-04 | Phase shift unit |
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|---|---|---|---|
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| CN104183890B CN104183890B (en) | 2017-05-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244567A (en) * | 2015-10-16 | 2016-01-13 | 深圳国人通信股份有限公司 | Phase shifter |
| CN113363735A (en) * | 2021-05-25 | 2021-09-07 | 武汉虹信科技发展有限责任公司 | 5G large-scale array electrically-controlled antenna |
| WO2022036994A1 (en) * | 2020-08-20 | 2022-02-24 | 京信通信技术(广州)有限公司 | Phase shifter unit, phase shifter, and array antenna |
| CN117525778A (en) * | 2024-01-05 | 2024-02-06 | 成都爱科特科技发展有限公司 | Novel microstrip phase adjustment device |
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| CN204011611U (en) * | 2014-08-04 | 2014-12-10 | 京信通信技术(广州)有限公司 | A kind of phase-shifting unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105244567A (en) * | 2015-10-16 | 2016-01-13 | 深圳国人通信股份有限公司 | Phase shifter |
| WO2022036994A1 (en) * | 2020-08-20 | 2022-02-24 | 京信通信技术(广州)有限公司 | Phase shifter unit, phase shifter, and array antenna |
| CN113363735A (en) * | 2021-05-25 | 2021-09-07 | 武汉虹信科技发展有限责任公司 | 5G large-scale array electrically-controlled antenna |
| CN117525778A (en) * | 2024-01-05 | 2024-02-06 | 成都爱科特科技发展有限公司 | Novel microstrip phase adjustment device |
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